7842e56b97
git-svn-id: svn://svn.code.sf.net/p/fonttools/code/trunk@2 4cde692c-a291-49d1-8350-778aa11640f8
145 lines
4.1 KiB
Python
145 lines
4.1 KiB
Python
import Res
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import macfs
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import struct
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import Qd
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from types import *
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class NFNT:
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def __init__(self, nfnt, name = "", _type = 'NFNT'):
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if type(nfnt) == type(Res.Resource("")):
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theID, theType, name = nfnt.GetResInfo()
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if theType <> _type:
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raise TypeError, 'resource of wrong type; expected ' + _type
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data = nfnt.data
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elif type(nfnt) == StringType:
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fss = macfs.FSSpec(nfnt)
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data = readnfntresource(nfnt, name, _type)
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elif type(nfnt) == type(macfs.FSSpec(':')):
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data = readnfntresource(nfnt, name, _type)
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else:
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raise TypeError, 'expected resource, string or fss; found ' + type(nfnt).__name__
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self.parse_nfnt(data)
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def parse_nfnt(self, data):
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# header; FontRec
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( self.fontType,
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self.firstChar,
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self.lastChar,
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self.widMax,
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self.kernMax,
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self.nDescent,
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fRectWidth,
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self.fRectHeight,
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owTLoc,
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self.ascent,
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self.descent,
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self.leading,
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self.rowWords ) = struct.unpack("13h", data[:26])
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if owTLoc < 0:
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owTLoc = owTLoc + 0x8000 # unsigned short
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# rest
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tablesize = 2 * (self.lastChar - self.firstChar + 3)
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bitmapsize = 2 * self.rowWords * self.fRectHeight
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self.bits = data[26:26 + bitmapsize]
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self.bitImage = Qd.BitMap(self.bits, 2 * self.rowWords, (0, 0, self.rowWords * 16, self.fRectHeight))
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owTable = data[26 + bitmapsize + tablesize:26 + bitmapsize + 2 * tablesize]
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if len(owTable) <> tablesize:
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raise ValueError, 'invalid NFNT resource'
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locTable = data[26 + bitmapsize:26 + bitmapsize + tablesize]
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if len(locTable) <> tablesize:
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raise ValueError, 'invalid NFNT resource'
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# fill tables
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self.offsettable = []
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self.widthtable = []
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self.locationtable = []
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for i in range(0, tablesize, 2):
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self.offsettable.append(ord(owTable[i]))
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self.widthtable.append(ord(owTable[i+1]))
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loc, = struct.unpack('h', locTable[i:i+2])
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self.locationtable.append(loc)
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def drawstring(self, astring, destbits, xoffset = 0, yoffset = 0):
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drawchar = self.drawchar
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for ch in astring:
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xoffset = drawchar(ch, destbits, xoffset, yoffset)
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return xoffset
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def drawchar(self, ch, destbits, xoffset, yoffset = 0):
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width, bounds, destbounds = self.getcharbounds(ch)
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destbounds = Qd.OffsetRect(destbounds, xoffset, yoffset)
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Qd.CopyBits(self.bitImage, destbits, bounds, destbounds, 1, None)
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return xoffset + width
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def stringwidth(self, astring):
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charwidth = self.charwidth
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width = 0
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for ch in astring:
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width = width + charwidth(ch)
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return width
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def charwidth(self, ch):
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cindex = ord(ch) - self.firstChar
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if cindex > self.lastChar or \
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(self.offsettable[cindex] == 255 and self.widthtable[cindex] == 255):
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cindex = -2 # missing char
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return self.widthtable[cindex]
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def getcharbounds(self, ch):
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cindex = ord(ch) - self.firstChar
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if cindex > self.lastChar or \
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(self.offsettable[cindex] == 255 and self.widthtable[cindex] == 255):
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return self.getcharboundsindex(-2) # missing char
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return self.getcharboundsindex(cindex)
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def getcharboundsindex(self, cindex):
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offset = self.offsettable[cindex]
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width = self.widthtable[cindex]
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if offset == 255 and width == 255:
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raise ValueError, "character not defined"
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location0 = self.locationtable[cindex]
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location1 = self.locationtable[cindex + 1]
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srcbounds = (location0, 0, location1, self.fRectHeight)
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destbounds = ( offset + self.kernMax,
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0,
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offset + self.kernMax + location1 - location0,
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self.fRectHeight )
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return width, srcbounds, destbounds
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def readnfntresource(fss, name, _type = 'NFNT'):
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resref = Res.FSpOpenResFile(fss, 1) # readonly
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Res.UseResFile(resref)
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try:
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if name:
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res = Res.Get1NamedResource(_type, name)
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else:
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# just take the first in the file
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res = Res.Get1IndResource(_type, 1)
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theID, theType, name = res.GetResInfo()
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if theType <> _type:
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raise TypeError, 'resource of wrong type; expected ' + _type
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data = res.data
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finally:
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Res.CloseResFile(resref)
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return data
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if 0:
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import Win
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fss, ok = macfs.StandardGetFile('FFIL')
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if ok:
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n = NFNT(fss)
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s = "!!!ABCDEFGHIJKLMN01234 hemeltje lief...x.."
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x = 10
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y = 40
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destbits = Win.FrontWindow().GetWindowPort().portBits
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n.drawstring(s, destbits, x, y)
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print n.stringwidth(s)
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